Did you know?
That the device for measuring radioactivity: The Geiger Counter, is actually very simple?
Geiger Counter (Image from commons.wikimedia.org)
^See that tube attached to the counter? That’s the Geiger-Muller tube and it’s filled with argon gas. The tube itself if made of aluminium and is negatively charged (with an electrode attached), there is another central electrode which carries a positive charge.
If radiation passes the window on the end of the tube (known as the mica window), the gas inside the tube is ionised and electrons are released.
These electrons will be attracted to the central positively charged electrode, this momentarily sets into play a positive feedback loop in which more gas becomes iodised, creating a pulse of current between the electrodes.
This pulse is often heard as a ‘click’ sound.
). Now all my problems are fixed XD